Electrical Circuit Test
- Connect a 12-volt test light between the coil positive terminal and ground. Turn ignition switch "ON". Test light should light. If not, check feed wire to coil. See Fig 1.
- Connect test light between coil negative terminal and ground. Turn ignition switch "ON". Test light should again light. If not, check if coil primary circuit is broken or if electronic control unit's power transistor is shorted.